Apparatus for assembling armatures



April 8, 1930. M. HENNING APPARATUS FOR ASSEMBLING ARMATURES Filed OCb, 9, 1928 Patented Apr. 8, 1930 f UNITED STATES PATENT Frise MORTIE HENNING, OF DAYTON, OI-IIO, ASSIGFTOR, BY MESNEVASSIGNMENTS, TO DELCO PRODUCTS CORPORATION, OF DAYTON, OHIO, A CORPORATION OF DELAWARE APPARATUS FOR ASSEMBLING- ARMATURES Application led October 9, 1928.

This invention relates to improvements in the apparatus for counterbalancing shafts.

An object of the invention is to provide a simple apparatus for securing balanced Weights to a shaft to be balanced.

Further objects and advantages of the present invention will be apparent from the following description, reference being had to the accompanying drawings, wherein a preferred embodiment ofone form of the present invention is clearly shown.

In the drawings:

Fig. 1 is a perspective view of the apparatus in its operative position.

Fig. 2 is a perspective view of the apparatus in its inoperative position.

Figs. 3 and 4 are plan views showing the balancing weights before and after being secured to the shaft to be balanced.

Referring to the drawings, the reference character A indicates a frame having attached thereto a suitable armature support B for rotatably supporting the armature 10. The upright 14, members and 16 and pin 17 form a hinge for hingedly securing member C to the frame A. rFhe handle 18, which is secured to member C by bolts 19, is used by the operator for raising member C from operative position to inoperative position, and 3o vice versa. Levers 21 and 22 are pivotally secured to member C by a bolt 23 and its nut 24. On one end of levers 21 and 22 are mounted jaws 26 and 27 each having a prong or tooth-like extension 28 and 29 respectively. Cn the other end of levers 21 and 22 are attached members 30 and 31 by means of pins 32 and 33, the members 30and 31 being pivotally connected to each other and slidably connected to member C by means of bolt 34 which is slidably mounted in the slot 36 of the frame C. This arrangement of members 30 and 31 is substantially a toggle mechanism.

It is readily seen from this structure that as handle 35, which is integral with member 30, is moved, the angles formed with a line through the centers of 23 and 34 and each of the jaws 26 and 27 will always be equal re- 50 gardless of the position of handle 35. The

Serial No. 311,395.

reason why it is desired to have these angles equal will be explained later.

Compression spring 42 is mounted between lever 22 and stud 43, which is attached to member C. The function of the spring 42 is to maintain the jaws 26 and 27 in the open position whenever no external force is applied to the handle 35. Upright 44 and a. cushion ing member 45 provide a suitable stop for member C when it is in the inoperative posivtion as disclosed in Fig. 2.

Member 40 is attached to member C by means of bolts 41, only. one of which is shown. Adjustably attached to member 40 is a pin 38 whose center lies in the same' line as does the centers of pivot 23 and pin 34. The function of this pin 38 will appear later.

In the manufacture of rotating parts, especially such rotating parts as an armature which is built up of a multiplicity of parts, it is practically impossible to build them so as to have a perfect balance; therefore it is customary to balance the armature after assembling. An expedient method for balancing armatures by means of balancing weights is set forth in the copending application 0f iVm. G. Pontis, Serial No. 120,587, led July 6, 1926. By this method, the distribution of the counter-balancing weightsis made to a mathematical certainty. How this is accomplished does not form a part of this invention, and therefore it is not necessary to set forth the particulars. Suliice to state that the balancing is accomplished by two balanced weights 56 and 56 which are fixedly secured in a cup-shaped member 12 mounted on the armature shaft 13.

After their location is determined by the method disclosed in the above referred to application, the balancing weights 56 and 56 being temporarily held in place by the'clamp 59, the pin 38 and the aperture 57 in the coun ter-balancing weight 56are aligned. When thesehave beenaligned, member Cis lowered and pin 38 inserted into aperture 57, the apparatus in this vposition being shown in Fig. 1. l/Vhen the operator rotates the handle 35` clockwise, as viewed in Fig. 1, the teeth or prongs ,28 and 29 bend the legs 58 from the position disclosed in Fig. 3 to the position dissecure the balancing weight 56.

closed in Fig. iff-that is the legs 58 engage the sleeve 51, thereby wedging 56 between flange 50 and the sleeve 5l. Being the jaws are so constructed and arranged as to make equal distances with respect to pin 38 as already described, each of the legs 58 will be bent equal increments, thereby causing the center of gravity of member 56 to lie in the same radial plane, which the center of the armature shaft lies, as before being bent.

After the balancing weight 56 has been secured, member C is raised to the inoperative position disclosed in Fig.' 2, the armature rotated so that aperture 57 in the balancing weight 56 is in alignment with pin 38. Member C is again lowered into position as disclosed in Fig. l, lever 35 `is rotated clockwise as viewed in Fig. l so that the teeth 28 and 29 grip and bend the legs 58 so as to liXedly Block C is again raised, the armature removed from the support, another armature inserted into the support, and the above operation is repeated.

lhile the form of embodiment of the present invention as herein disclosed, constitutes a preferred form, it is to be understoodl that other forms might be adopted, all coming within ythe vscope of the claims which follow.

l/Vh'at is claimed is as follows:

l. An apparatus for securing balance weightsl having formable parts to a retainer on a shaft to be balanced, comprising, in combination, a pivotally mounted sufp'port, meansl for holding each balance weight while being attached, a pair of movab-le members each having` a ja'w on one end for engaging the formable parts of the balance weights for securing the balance Yweights in place, and means for moving said members.

2.'An apparatus for securing balance weights with formable legs -to a retainer on a member to be balanced comprising, in combination, a frame, a movable support on the frame, means for holding the vbalance weights CTX while being attached, a pair of levers mounted on the support each having a jaw on one end for bending the legs on vthe balance weight, means for closing said jaws comprising a handle pivotally attached to the other end of one of the levers and a link connecting the other end of the other lever to said handle, and resilient means for opening said jaws.

3. An apparatus for securing balance weights with legs to a retainer on a member to be balanced comprising, in combination, a support, a paiir of jaws pivotally mounted 'on the support, a toggle mechanism for Iclosing the jaws so as to bend the legs yon the'balance weight, 'and means for aligning thek weights 4. yAn apparatus for securing a balance weight having av pai-r of legs, the balance weight being secured to a retainer on the member to be balanced bybendi'ng the legs comprising in combination, means for aligning the balance weight and the retainer, said means comprising a pair of jaws and a toggle, said jaws and toggle being so constructed and arranged as to bend the legs on said balance weights equally, thereby to prevent displacement of the center of gravity of said balance weight and to secure the balance weight in the retainer. l

5. An apparatus for bending the legs on a balance weight to be wedged into aretainer on a member to be balanced comprising, in combination, a pivotedsupport, a handle attached to said support for raising and lowering said support, a pair of jaws pivotally mounted on said support, a toggle mechanism for lclosing said jaws so as to bend the legs toward the center of said balance, thereby wedgingfsaid balance weight to said retainer.

6. An apparatus for bending the legs on a balance weight to be wedged into a retainer on an armature shaft `to be balanced compris ing, -i-n combination, a pivoted support having a slot, a handle for rotating 'said support, a pair of levers pivotally mounted on said support, each of said levers carrying a jaw 'with a projection thereon for engaging the legs on the balance weight, means for centering the balance weights with respect to the jaws,

a toggle mechanism attached to said levers 1" and guided in the slot, a handle cooperating with said toggle to close the jaws thereby wedging the legs on said balance weight, said levers and said toggle being so constructed and arranged vas to move the jaws equal increments of distance with respect to the centering means to thereby prevent circumferential displacement of the center of gravity of sa-id balancing weights, and resilient means cooperating with said levers to open the jaws.

In testimony whereof I hereto affix my signature.

MORTIE l-IENNING.

` to thereby wedge the weight in` the retainer, 

